Stripe light source

Abstract

The utility model relates to the technical field of surface defect detection, and discloses a stripe light source. The stripe light source comprises two total reflection plates which are oppositely arranged, a stripe plate is connected between the two total reflection plates, and the stripe plate is provided with a plurality of strip-shaped light outlet channels which are arranged in parallel; each total reflection plate is provided with a light-emitting assembly, and the two light-emitting assemblies are jointly connected to form an arched diffuse reflection arc. At least one section of the total reflection plate is arranged to be a total reflection face, and the total reflection face is arranged to face the light-emitting assembly. The stripe light source provided by the utility model can replace a large area light source to realize flatness detection of a large plane, and the manufacturing cost of the stripe light source is reduced; moreover, the emitted light can uniformly irradiate the stripe plate after being reflected by the diffuse reflection arc, so that the consistency of the emitted stripe light can be ensured; in addition, as the light-emitting area of the light source is reduced, the heating value of the stripe light source is reduced to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of surface defect detection, in particular to a stripe light source. Background Art

[0002] In the application of defect detection using machine vision, the detection of surface flatness has always been one of the more important detection items in this field. The detection of surface flatness is generally applied to the machine vision detection of products with planes or mirrors. In the prior art, machine vision detection generally irradiates a workpiece to be measured with a light source, then uses an imaging device to image, and finally analyzes the image to obtain the surface defects of the workpiece to be measured. This detection method can detect obvious defects existing on the surface of the workpiece to be measured, such as scratches, dirt, bubbles, etc., but cannot effectively detect the flatness of the workpiece surface. Therefore, in the prior art, it is generally necessary to additionally use a flatness tester to achieve the detection of surface flatness, which not only adds extra detection steps but also increases the detection cost.

[0003] A Chinese patent with the application number "201620652766.2" and the patent name "Surface Flatness Detection Equipment" discloses a light source assembly that forms uniformly spaced parallel stripes on the product surface. Specifically, the implementation is as follows: The light source assembly and the camera assembly are arranged above the product fixture. The light source assembly has a pattern light source, and after the pattern light source irradiates the product surface, uniformly spaced parallel stripes are formed on the product surface. Specifically, in the specification of this patent, it is disclosed that the pattern light source includes a light-emitting body, such as an LED light-emitting body, and a stop disposed in front of the light-emitting body for cutting the light emitted by the light-emitting body. The stop has a hollow pattern, and in this embodiment, the hollow pattern is a parallel horizontal stripe or a parallel vertical stripe. By irradiating the parallel stripes (light) onto the surface of an object and judging the distortion of the parallel stripes, the detection of surface flatness can be achieved. Compared with the prior art, it simplifies the detection process and improves the detection efficiency.

[0004] However, the patented structure is only applicable to the flatness detection of small tool planes. Because when detecting large flat products, a large and evenly lit surface light source is required to obtain the fringe light covering the workpiece surface and complete the flatness detection at one time. Moreover, the "light-emitting body" in this patent directly forms the irradiation light through the hollow pattern. The smaller the "light-emitting body" is relative to the hollow pattern (or the product irradiation area), the less guaranteed the light consistency will be. The farther away from the "light-emitting body", the weaker the light will be. In industrial vision inspection, especially for the inspection of high-precision mirrors, the light consistency will directly affect the accuracy of the inspection results to a certain extent. For example, when the light in some areas of the surface of the workpiece to be inspected is relatively weak, if the light reflectivity of the surface of the workpiece to be inspected is not that high or there are only slight protrusions and other defects on the surface of the workpiece to be inspected, the distortion change of the fringes may not be accurately identified, thus directly affecting the accuracy of the inspection results. Therefore, in order to ensure high-precision inspection, the "light-emitting body" in the above patented technology needs to be made into a relatively large surface light source as much as possible, preferably as large as the hollow pattern. However, the new problems it brings are: the larger the surface light source is made, the higher the cost will be, and the greater the heat generation will be, and the heat dissipation problem has also become a major problem.

[0005] In view of this, there is an urgent need in the art to design a fringe light source that can be applied to surface flatness detection to solve the technical problems of high cost and poor heat dissipation of the fringe light source in the prior art.

[0006] The above information is given as background information only to assist in understanding the present disclosure, and does not determine or admit whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a fringe light source to solve or at least partially solve the technical problems existing in the prior art.

[0008] To achieve this purpose, the present utility model adopts the following technical solutions:

[0009] The present utility model provides a fringe light source, including: two total reflection plates arranged oppositely, a fringe plate is connected between the two total reflection plates, and the fringe plate has a plurality of parallel strip-shaped light-emitting channels;

[0010] Light-emitting components are respectively installed on each of the total reflection plates, and the two light-emitting components are jointly connected to form an arched diffuse reflection arc; at least one section of the total reflection plate is set as a total reflection surface, and the total reflection surface faces the light-emitting component;

[0011] The light emitted by the light-emitting component can be reflected by the total reflection surface to the diffuse reflection arc, then diffusely reflected by the diffuse reflection arc to the stripe plate, and emitted through the strip-shaped light-emitting channel to the side of the stripe plate away from the diffuse reflection arc.

[0012] Optionally, the light-emitting component includes a lamp board and a radiator;

[0013] The radiator is mounted on the total reflection plate, and the lamp board is fixedly arranged on the side of the radiator close to the stripe plate.

[0014] Optionally, the radiator is provided with a mounting groove; the relatively arranged two side edges of the diffuse reflection arc are respectively embedded in the mounting grooves of the two light-emitting components.

[0015] Optionally, the stripe plate is a transparent plate, and a plurality of parallel light-blocking stripes are uniformly arranged at intervals on the surface of the stripe plate; the strip-shaped light-emitting channel is formed between two adjacent light-blocking stripes;

[0016] The diffuse reflection arc, the two light-emitting components, the two total reflection plates, and the stripe plate together enclose a closed inner cavity.

[0017] Optionally, the stripe plate is also arched; the light-blocking strips are black stripes printed on the side of the stripe plate away from the diffuse reflection arc.

[0018] Optionally, the relatively arranged side edges of the two total reflection plates respectively extend outward to form flanges;

[0019] A limiting groove is formed at the top of the flange; the relatively arranged two side edges of the stripe plate are embedded in the limiting groove.

[0020] Optionally, the limiting groove is a through groove, and the relatively arranged two side edges of the stripe plate can respectively extend out from the notch at the end of the two limiting grooves away from the diffuse reflection arc;

[0021] On the flange or the total reflection plate, a stripe pitch adjusting member for tightly fixing the stripe plate is provided.

[0022] Optionally, the total reflection plate includes a first plate body and a second plate body connected into one body; an obtuse angle is formed at the connection of the first plate body and the second plate body;

[0023] The total reflection surface is arranged on the surface of the first plate body close to the light-emitting component.

[0024] Optionally, a plurality of heat dissipation grooves are formed on the surface of the radiator away from the lamp board.

[0025] Optionally, a plurality of light-emitting bodies with the same power are connected in parallel on the lamp board.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] The stripe light source provided by the utility model forms a light-emitting structure through the light sources separated on both sides of the stripe board, combined with the total reflection board and the diffuse reflection arc, which can replace the large-area light source to realize the flatness detection of the large plane, and reduces the manufacturing cost of the stripe light source; moreover, the light emitted is reflected by the diffuse reflection arc and can be evenly irradiated on the stripe board, ensuring the consistency of the emitted stripe light; in addition, since the light-emitting area of the light source is reduced, the heat generation of the stripe light source is also reduced to a certain extent.

[0028] The utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent specific embodiments, or will be described in detail in the accompanying drawings incorporated herein and the subsequent specific embodiments. These accompanying drawings and specific embodiments are used together to explain the specific principles of the utility model. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described accompanying drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of a stripe light source provided by an embodiment of the present utility model;

[0031] Figure 2 It is a schematic structural diagram of another stripe light source provided by an embodiment of the present utility model;

[0032] Figure 3 It is a schematic structural diagram of a stripe board provided by an embodiment of the present utility model.

[0033] Reference Signs:

[0034] 10, total reflection board; 101, first plate body; 102, second plate body; 11, total reflection surface; 12, flange; 121, limit groove; 122, stripe pitch adjusting member; 20, light-emitting assembly; 21, lamp board; 211, light-emitting body; 22, radiator; 221, installation groove; 222, heat dissipation groove; 30, inner cavity; 40, diffuse reflection arc; 50, stripe board; 51, light-blocking stripe. Detailed Embodiments

[0035] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable objectives and effects of this application, etc., the following will be described in detail with reference to the specific examples listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0036] Reference to "embodiment" in this document means that a specific feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those generally understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0038] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this document generally represents an "or" logical relationship between the associated objects before and after.

[0039] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary-secondary or sequential relationship, etc. between these entities or operations.

[0040] Without more limitations, in this application, the use of the expressions "including", "comprising", "having" or other similar expressions in a statement is intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product including the said elements, so that a process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such a process, method or product.

[0041] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", and "exceeding" are understood as not including the base number; expressions such as "above", "below", and "within" are understood as including the base number. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two), and similar expressions related to "many" are understood in the same way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically defined.

[0042] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the accompanying drawings, and is only for the convenience of describing the specific embodiments of this application or facilitating the understanding of the reader, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it cannot be understood as a limitation to the embodiments of this application.

[0043] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms such as "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which this application belongs, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0044] In view of the defects of the fringe light source in the prior art, based on the rich practical experience and professional knowledge in the design and manufacture of such products for many years by the applicant, and in cooperation with the application of theory, research and innovation have been actively carried out in the hope of creating a technology that can solve the defects in the prior art and make the fringe light source more practical. After continuous research, design, and repeated trial production of samples and improvement, finally, the present utility model with practical value has been created.

[0045] Embodiment 1:

[0046] Please refer to Figure 1 , Figure 1 which is the structural schematic diagram of a fringe light source provided by an embodiment of the present utility model. The fringe light source includes two totally reflecting plates 10 arranged oppositely, and a fringe plate 50 is connected between the two totally reflecting plates 10. The fringe plate 50 has a plurality of parallel strip-shaped light-emitting channels;

[0047] A light-emitting component 20 is respectively installed on each total reflection plate 10, and the two light-emitting components 20 are jointly connected to form a arched diffuse reflection arc 40; at least one section of the total reflection plate 10 is set as a total reflection surface 11, and the total reflection surface 11 is arranged facing the light-emitting component 20;

[0048] It should be noted that Figure 1 the dotted lines in represent the optical path, Figure 1 the lower surface of the diffuse reflection arc 40 in is a diffuse reflection surface; as Figure 1 shown, the light emitted by the light-emitting component 20 can be reflected by the total reflection surface 11 to the diffuse reflection arc 40, and then diffusely reflected by the diffuse reflection arc 40 to the stripe plate 50. In this way, the brightness of the light irradiated on the stripe plate 50 is more uniform, and finally it is emitted through the strip-shaped light-emitting channel to the side of the stripe plate 50 away from the diffuse reflection arc 40 (that is, Figure 1 the lower side of the stripe plate 50 in).

[0049] The strip-shaped light source composed of the above structure can replace a large-area light source to realize the light source detection of a larger plane, and can greatly reduce the manufacturing or use cost of the stripe light source; moreover, since the light-emitting area of the light source is reduced, the heat generation of the stripe light source is also reduced to a certain extent, and the continuous detection time of the light source can be effectively improved.

[0050] Specifically, the light-emitting component 20 includes a lamp board 21 and a radiator 22; among them, a plurality of light-emitting bodies 211 with the same power are electrically connected to the lamp board 21. As an optional implementation manner, the plurality of light-emitting bodies 211 of the lamp board 21 are connected together in parallel;

[0051] The radiator 22 is installed on the total reflection plate 10, and the lamp board 21 is fixedly arranged on the side of the radiator 22 close to the stripe plate 50.

[0052] In this embodiment, by arranging the radiator 22 on the exposed side of the lamp board 21, the heat generated when the lamp board 21 works can be quickly dissipated into the air. Further, by arranging a fan or a refrigeration device outside the radiator 22, the heat dissipation efficiency can be further increased, the continuous detection time of the light source is greatly improved, and the safety and stability of the light source use are also provided.

[0053] More specifically, as an optional implementation manner, the diffuse reflection arc 40 can be an arched plate with a pre-determined shape, or a hard plate with a certain elasticity or flexibility, and the hard plate can be bent into a certain arc, that is, the above-mentioned arched shape;

[0054] In this embodiment, an installation groove 221 is provided on the radiator 22; the relatively arranged two side edges of the diffuse reflection arc 40 (that is, Figure 1 the left and right side edges of the diffuse reflection arc 40 in) are respectively fixedly embedded in the installation grooves 221 of the two light-emitting components 20.

[0055] As an alternative embodiment, the stripe plate 50 can be in the form of a baffle with a hollow pattern as in the background art to achieve the emission of stripe light. However, more preferably, as Figure 3 shown, Figure 3 is a schematic structural diagram of the stripe plate 50 provided by an embodiment of the present invention;

[0056] Specifically, the stripe plate 50 is a transparent plate, and a plurality of parallel light-blocking stripes 51 are evenly arranged at intervals on the surface of the stripe plate 50, and a strip-shaped light-emitting channel is formed between two adjacent light-blocking stripes 51;

[0057] The diffuse reflection arc 40, two light-emitting components 20, two total reflection plates 10 and the stripe plate 50 jointly enclose a sealed inner cavity 30.

[0058] By adopting the sealed inner cavity 30, all the light paths such as the light-emitting body 211, the diffuse reflection surface and the total reflection surface are isolated from the outside, which can effectively prevent dust or impurities from entering the light path of the strip light source, greatly improving the detection stability of the strip light source; the staff only needs to perform regular maintenance and wipe the exposed surface of the stripe plate 50 ( Figure 1 the lower surface of the stripe plate 50 in

[0059] is sufficient, and the maintenance is relatively more convenient.

[0060] Specifically, on one side of the two total reflection plates 10 close to each other, flanges 12 are respectively formed and extend outward;

[0061] A limiting groove 121 is formed at the top of the flange 12; the opposite two side edges of the stripe plate 50 are fixedly embedded in the limiting groove 121.

[0062] Specifically, the total reflection plate 10 includes a first plate body 101 and a second plate body 102 connected in a "V" shape; the included angle at the connection of the first plate body 101 and the second plate body 102 is an obtuse angle;

[0063] The light-emitting component 20 is installed on the second plate body 102; the total reflection surface 11 is arranged on one side surface of the first plate body 101 close to the light-emitting component 20.

[0064] More specifically, a plurality of heat dissipation grooves 222 are formed on the surface of the radiator 22 away from the lamp board 21. The provision of the heat dissipation grooves 222 increases to a certain extent the heat exchange area between the radiator 22 and the outside world, and can effectively improve the heat dissipation efficiency of the strip light source.

[0065] In summary, the stripe light source provided in this embodiment can achieve the flatness detection of a large plane without sampling a large area light source, which not only reduces the manufacturing cost of the stripe light source, but also has better consistency of the emitted stripe light; moreover, the stripe light source has a good heat dissipation effect and can effectively increase the continuous detection time of the light source.

[0066] Embodiment 2:

[0067] Please refer to Figure 2 , Figure 2 which is the structural schematic diagram of another stripe light source provided by the embodiment of the present invention; the difference between this stripe light source and the stripe light source in Embodiment 1 is that:

[0068] The limiting groove 121 is set as a through groove, and the two opposite side edges of the stripe plate 50 can respectively extend out from the ends of the two limiting grooves 121 away from the diffuse reflection arc 40.

[0069] On the flange 12 or the total reflection plate 10, there is provided a stripe pitch adjusting member 122 for tightly fixing the stripe plate 50.

[0070] Through the above structural settings, the stripe pitch of the emitted stripe light can be finely adjusted to a certain extent, so that the applicable detection scenarios are more extensive.

[0071] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application, using the content recorded in the text and drawings of the specification of the present application, and any technical solutions directly or indirectly implementing the above embodiments in other related technical fields are all included in the patent protection scope of the present application.

Claims

1. A stripe light source, characterized in that: Comprising: Two totally reflecting plates (10) arranged oppositely, a striated plate (50) is connected between the two totally reflecting plates (10), and the striated plate (50) has a plurality of parallel strip-shaped light-emitting channels; Light-emitting components (20) are respectively mounted on each of the totally reflecting plates (10), and the two light-emitting components (20) are commonly connected to form an arched diffuse reflection arc (40); at least one section of the totally reflecting plate (10) is set as a total reflection surface (11), and the total reflection surface (11) is arranged facing the light-emitting component (20); The light emitted by the light-emitting component (20) can be reflected by the total reflection surface (11) to the diffuse reflection arc (40), then diffusely reflected by the diffuse reflection arc (40) to the striated plate (50), and emitted from the strip-shaped light-emitting channels to the side of the striated plate (50) away from the diffuse reflection arc (40).

2. The striped light source according to claim 1, characterized in that, The light-emitting component (20) includes a lamp board (21) and a radiator (22); The radiator (22) is mounted on the totally reflecting plate (10), and the lamp board (21) is fixedly arranged on the side of the radiator (22) close to the striated plate (50).

3. The striped light source according to claim 2, characterized in that, An installation groove (221) is arranged on the radiator (22); the oppositely arranged two side edges of the diffuse reflection arc (40) are respectively embedded in the installation grooves (221) of the two light-emitting components (20).

4. The stripe light source according to claim 3, wherein, The striated plate (50) is a transparent plate, and a plurality of parallel light-blocking stripes (51) are evenly arranged at intervals on the surface of the striated plate (50), and the strip-shaped light-emitting channels are formed between two adjacent light-blocking stripes (51); The diffuse reflection arc (40), the two light-emitting components (20), the two totally reflecting plates (10) and the striated plate (50) jointly enclose to form a closed inner cavity (30).

5. The stripe light source according to claim 4, characterized in that, The striated plate (50) is also arched; the light-blocking stripes (51) are black stripes printed on the side of the striated plate (50) away from the diffuse reflection arc (40).

6. The stripe light source according to claim 5, characterized in that, Flanges (12) are respectively formed by extending outwardly on the side edges of the two totally reflecting plates (10) close to each other; A limiting groove (121) is formed at the top of the flange (12); the oppositely arranged two side edges of the striated plate (50) are embedded in the limiting groove (121).

7. The striped light source according to claim 6, wherein, The limiting groove (121) is a through groove, and the oppositely arranged two side edges of the striated plate (50) can respectively extend out from the slot openings at the ends of the two limiting grooves (121) away from the diffuse reflection arc (40); On the flange (12) or the totally reflecting plate (10), a stripe pitch adjusting member (122) for tightly fixing the striated plate (50) is arranged.

8. The stripe light source according to claim 1, wherein The totally reflecting plate (10) includes a first plate body (101) and a second plate body (102) connected into an integral body; an obtuse angle is formed at the connection of the first plate body (101) and the second plate body (102); The total reflection surface (11) is arranged on the surface of the first plate body (101) close to the light-emitting component (20).

9. The striped light source according to claim 2, characterized in that, A plurality of heat dissipation grooves (222) are formed on a surface of the radiator (22) away from the lamp board (21).

10. The striped light source according to claim 2, wherein, A plurality of light-emitting bodies (211) with the same power are connected in parallel on the lamp board (21).

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